AHFS DI is the most comprehensive evidence-based source of drug information complete with therapeutic guidelines and off-label uses. The only print compendium designated by the US Congress, AHFS DI is also the only reference published by a non-profit scientific association–ensuring it is the most authoritative and best-selling reference trusted by pharmacists for over 50 years. AHFS DI is the most comprehensive evidence-based source of drug information complete with therapeutic guidelines and off-label uses. The only print compendium designated by the US Congress, AHFS DI is also the only reference published by a non-profit scientific association–ensuring it is the most authoritative and best-selling reference trusted by pharmacists for over 50 years. … Read More For AHFS Drug Information 2012 on Sale Product Description by Amazon.com